No module symbols loaded - kernel modules not enabled.

No module symbols loaded - kernel modules not enabled.

[Markus Elfring]

Hello,

I get the following output from the command "head -n 7 /var/log/boot.msg".

Inspecting /boot/System.map-2.6.23.1-default
Loaded 27483 symbols from /boot/System.map-2.6.23.1-default.
Symbols match kernel version 2.6.23.
No module symbols loaded - kernel modules not enabled.

klogd 1.4.1, log source = ksyslog started.
<5>Linux version 2.6.23.1-default (root@Sonne) (gcc version 4.2.1 (SUSE Linux)) #1 SMP
PREEMPT Sun Oct 28 15:34:56 CET 2007


A lot of discussions can be found around this specific notice about symbol loading. I am
interested in an explanation for the effects on the current kernel.
Does it just mean that no debugging symbols were loaded?

Load all symbols for debugging/ksymoops (KALLSYMS):
"Say Y here to let the kernel print out symbolic crash information and
symbolic stack backtraces. This increases the size of the kernel
somewhat, as all symbols have to be loaded into the kernel image."


The following configuration option is active on my system, of course.

Automatic kernel module loading (KMOD):
"Normally when you have selected some parts of the kernel to
be created as kernel modules, you must load them (using the
"modprobe" command) before you can use them. If you say Y
here, some parts of the kernel will be able to load modules
automatically: when a part of the kernel needs a module, it
runs modprobe with the appropriate arguments, thereby
loading the module if it is available. If unsure, say Y."

Regards,
Markus

Re: No module symbols loaded - kernel modules not enabled.

[Jan Engelhardt]

On Oct 28 2007 20:50, Markus Elfring wrote:
>Hello,
>
>I get the following output from the command "head -n 7 /var/log/boot.msg".
>
>Inspecting /boot/System.map-2.6.23.1-default
>Loaded 27483 symbols from /boot/System.map-2.6.23.1-default.
>Symbols match kernel version 2.6.23.
>No module symbols loaded - kernel modules not enabled.
>
>klogd 1.4.1, log source = ksyslog started.
><5>Linux version 2.6.23.1-default (root@Sonne) (gcc version 4.2.1 (SUSE Linux)) #1 SMP
>PREEMPT Sun Oct 28 15:34:56 CET 2007
>
>
>A lot of discussions can be found around this specific notice about symbol loading. I am
>interested in an explanation for the effects on the current kernel.
>Does it just mean that no debugging symbols were loaded?

This message is added by klogd, and it is independent of CONFIG_KALLSYMS.
(Since I do have KALLSYMS=y while also getting that message. I suppose
it is because CONFIG_DEBUG_INFO=n)

Re: No module symbols loaded - kernel modules not enabled.

[Markus Elfring]

> This message is added by klogd, and it is independent of CONFIG_KALLSYMS.
> (Since I do have KALLSYMS=y while also getting that message. I suppose
> it is because CONFIG_DEBUG_INFO=n)

I could not find the message text in my kernel source directory so far. I had also no luck
with a cross reference like "http://lxr.linux.no/search".
Which source code is responsible for the notice?

Regards,
Markus

Re: No module symbols loaded - kernel modules not enabled.

[Jan Engelhardt]

On Oct 28 2007 22:35, Markus Elfring wrote:
>
>> This message is added by klogd, and it is independent of CONFIG_KALLSYMS.
>> (Since I do have KALLSYMS=y while also getting that message. I suppose
>> it is because CONFIG_DEBUG_INFO=n)
>
>I could not find the message text in my kernel source directory so far. I had also no luck
>with a cross reference like "http://lxr.linux.no/search".
>Which source code is responsible for the notice?
>

Like I said, klogd. This seems to be outside the scope of LKML.

Re: No module symbols loaded - kernel modules not enabled.

[Markus Elfring]

> Like I said, klogd. This seems to be outside the scope of LKML.

Which function instructs the kernel log daemon to record the notice at the beginning of
the boot process?
http://chuck.netbsd.sk/source/xref/sysklogd-1.4.1rh/klogd.c

Is the message sent by a printk() call?
Where is the text "Inspecting" passed?

Regards,
Markus

Re: No module symbols loaded - kernel modules not enabled.

[Jan Engelhardt]

On Oct 29 2007 11:07, Markus Elfring wrote:
>
>> Like I said, klogd. This seems to be outside the scope of LKML.
>
>Which function instructs the kernel log daemon to record the notice at the beginning of
>the boot process?
>http://chuck.netbsd.sk/source/xref/sysklogd-1.4.1rh/klogd.c
>
>Is the message sent by a printk() call?
>Where is the text "Inspecting" passed?

Like I said, no. This is done by klogd.

Re: No module symbols loaded - kernel modules not enabled.

[Markus Elfring]

> Like I said, no. This is done by klogd.

Now I have found the notice "Inspecting" in the function "CheckMapVersion".
http://chuck.netbsd.sk/source/xref/sysklogd-1.4.1rh/ksym.c

I am interested to look at a source file that contains the dicussed error message. Does
anybody know a development package for the kernel log daemon?

Regards,
Markus

Re: No module symbols loaded - kernel modules not enabled.

[Jan Engelhardt]

>> Like I said, no. This is done by klogd.
>
>Now I have found the notice "Inspecting" in the function "CheckMapVersion".
>http://chuck.netbsd.sk/source/xref/sysklogd-1.4.1rh/ksym.c
>
>I am interested to look at a source file that contains the dicussed error message. Does
>anybody know a development package for the kernel log daemon?

syslogd...src.rpm in your distribution.

Re: development package for the kernel log daemon

[Markus Elfring]

> syslogd...src.rpm in your distribution.

I'm sorry - I can not select a -devel package for klogd, syslogd and syslog-ng in my YaST2
GUI so far. Would you like to suggest any additional installation source?

Regards,
Markus